Sectional steam-boiler



, (Nq Model.)

A1.- GRAIK. l SEGTIIONAL STEAM BOILER.

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Hllllll! N PETERS, Phom-Lilhnmphr. Wilhinglon, DJ;

Ummm) STAT-Es l PATENT Gamen.

ANDREW CRAIK, OF WILLIAMSPORT, PENNSYLVANIA.

SECTIONAL STEAM-BOlLER.

` SPECIFICATION forming part-of Letters Patent No. 334,568, dated January 19. 1886.

Application led May 11, i585.

To all whom t 77mg/ concern:

Be it known that I, ANDREW Cnam, of Williamsport, in the county ot' Lycoming and State of Pennsylvania, have invented certain new'and useful Improvements in Sectional Steam-Boilers, of which the following is a speciiication.

My invention relatesto that class of steamgenerators known as sectional boilers, a-nd it consists ina novel construction of the same, as hereinafter set forth.

In the drawings, Figure 1 is a vertical eentral section of my improved boiler; and Fig. 2 is a horizontal section of the same onv the line a' fr, Fig. 1.

The object of myinvention is, primarily, to increase the heating-surface and cause the iiames to remain for a long time in contact with the generator, while rendering the eonstruction cheap and strong and permitting repairs to be easily made; and to this end I construct the boiler as shown inthe drawings, in which'` A indicates the base of the boiler, composed of sections a b c. The section c forms the base proper of the boiler, on which it rests, and on which the section b is placed. Section bis provided with an outwardly-extendcd ledge or ilange, d, which rests upon the top of section ct lugs or hangers e on its lower inner face, which support the grate B, and an annular water-chamber, f, as clearly shown in Fig. 1. The upper edge of section bis formed with a ledge, upon which rests the section c, the latter extending upward and outward, as shown in Fig. 1, and provided at its upper end with a seat or socket for the jacket or easing C. This jacket or casing C extends upward quite a distance, and is furnished at its top with a conical cap, D, from which the smoke and products of combustion are carried off by a pipe. The lower edge o futheeap D is formed with an inwardly-extending nange, g, from which depends a circular jacket, h, eX- tending downward nearly to the section b, as shown in Fig. 1.A The flange g may be cast; with the cap D, or it may be sustained by and -rest upon lugs cast or bolted to the body c;

and it is likewise apparent that the depending Jacket h may be either cast with and form a part of the flange g, or be bolted thereto. I

Serial No. 165,073. (No model.)

prel'or, however, to enst the parts separate and bolt them together, as it not only renders easier the casting of the several parts, but also enables them to be assembled and put in place 'with more ease. The section b is furnished with hollow standards or legs z', which extend upward and support the series of Water-chambcrs E, as shown in Fig. 1. These chambers E are of the peculiar form shown in Figs. 1 ,and Q-that is to say, they are fiat and hollow, provided with a central supply and discharge orifice, j, and with vertical heat lues or passa-ges kin their laterally-extending wings or arms, as clearly shown in Figs. l and 2, resembling in form the figure 8. The number of the chambers may be varied as desired, and although EI have shown eight I do not confine myself' tothe number.

The upper and lower'central passages, j, are threaded to receive a short connecting pipe or thimble, Z, which is threaded at both ends and screws into the adjacent faces of the channbers E, as shown in Fig. 1, thereby connecting the chambers firmly together, and at the same time serving to conductthe water from one to another.

It will be seen, upon reference to the drawings, ihat the chambers E are placed at an angle with the chambers above and below, thus serving to intercept and heat much more thoroughly than il" they were placed directly one over another. The upper chamber E is connected` to a steam chamber or dome, F (shown in Fig. 1,) which spherical form;

A pipe, m, passes from the upper end of the stea1n-dome F to au engine, or to any other place to which itK is desired to convey the steam EX tending outward through the casing are two pipes, n, which are tapped into two of the gc neratin gchambers, and connected at their outerendsto a water-gage, G, as shown in Fig. 1.

In order to feed fuel to the furnace or I provide a door, position of which grate, H, (shown in Fig. 1,) the may be changed as desired. I prefer, however, to place it high enough to utilize the space between jackets C and la as a magazine for fuel.

The smoke and gases passing up between the jacket or casing C and the annular inten I prefer to make oi ICO . bers E, and heat the water nal jacket, h, escape into the inner chamber through holes or perforations u in the jacket h,about midway of its length above the door II. A pipe, 0, enters the bottom chamber E, and serves as the feed or suppiy pipe for the boiler.

I prefer to extend the section c upward ou the interior of the casing C a'eonsiderable distance, as shown in Fig. l, in order to prevent said casiing,which is mneh lighter, from burning ont.

As the iiaines and gases arise, they pass around and through the passages 7c ofthe chainthercin, the heat and iiames being deflected as they pass upward by the chambers E. This particular manner of mount-ing thc chambers E-that is to say, the alternating position-tends to greatly increase the generating capacity of the boiler.

The advantages of the 8 form over the cylindrical generators heretofore used are apparent. They are much lighter, and consequently easier to handle and putin place, are smaller and easier to cast, are cheaper, and, iinally, they permit the gases and heat to pass up on all sides, and also through the vertical iiues in their ends, thereby utilizing to the greatest possible degree all the heat.

lThe entire weight of the chambers comes upon the lower section, a, and it will be seen that by the lnanner of connecting the chambers, as herein shown, I dispense with all tiebolts, such as are usually employed. rIhese tie-bolts passing through the connecting-pipes tend to reduce the available water-space and enhance the cost of construction. Under my construction I have an uninterrupted waterspace through the pipes Zfrom top to bottom.

As shown clearly in Fig. 2, the water is confined in a passage of 8 shape,substantially, the heat passing up on all sides of the water and through the fines 7c in the ends ofthe generator.

The thimbles may be threaded alike at both ends or right and left, in which latter case the chamber will be turned to screw it upon a thimble previously screwed into the chamber below.

rIwo or more pipes, j), connect the bottom annular water-chambcrf with two ofthe upper chambers E, in order that there may be a perfect circulation ol' water through the chambers E.

Having thus described my invention, what I claim is l. In a sectional steam-boiler, the combination, with a casing or aseriesoi'chamhers,19,01'8form,substantially, and provided with a central water-outlet, j, and with vertical heat-lines 7c in its ends.

2. In a sectional steam-boiler constructed substantially as herein shown and described, the base A, consisting of sections c I) c, the section I) provided with upright hollow legs i, which support the chambers E, as set forth.

3. In a sectional steam-boiler substantially such as shown, the base A, consisting of the sections a b c, sect-ion c supporting the outer casing, and section b supporting the grate and the generating chambers and resting upon section a, as set forth.

4:. In a sectional steam-boiler, the combination,with base A,.gratc l5, casing C. top D, and chambers E, of iiange r/ and depending jacket h, as and for the purpose set forth.

5. In combination with generating-chambers E and fire-pot B, annular jackets Ch, encircling the chambers E and forming a fuelmagazine, substantially as described and shown.

(i. In a sectional steam-boiler substantially suoli as shown and described, the' combination ol' the chambers E and f and the pipes l), counecting the same, as shown.

ANDREWVT GRAIK.

Yiitnesses:

XV. l?. Rimax', C. LA'RUE Munson'.

body and a iire-pot, of 

